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Old 04-19-2004, 04:57 AM   #1
rosol11
LQ Newbie
 
Registered: Mar 2004
Location: Cracow, POLAND
Distribution: Red Hat 9.0
Posts: 13

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Unhappy Migrating to Kernel 2.6.x


Hello everyone,


I am considering migration to 2.6.x kernel from 2.4.x series, however I have some questions referring to certain steps of kernel upgrading procedure.

They say to to the following with 2.6.x series:

$ make bzImage
$ make modules
$ su
password:
# make modules_install
# make install

I know that instead of the 2 firs lines I could just type "make". That's no problem, however I'd like to skip the last step - the "make install" command, because I'd like to update my lilo.conf manually.

I read that this command (make install) also copies the bzImage and System.map into /boot directory and makes some links.

And here go my questions:

1. I've never heard about any need of copying nothing else but bzImage into /boot directory. And here suddenly they say that the System.map file has to be copied and renamed and also some links have to be removed and re-created. I have these links in the /boot directory - they were made together with normal RH9 Linux installation and they point to 2.4 kernel image and System.map-2.4. Do I have to change them to point into the new System.map and linux kernel image each time when adding a new kernel? What about having many kernels and the corresponding entries in lilo.conf?

2. What's the use of these links? What would happen if I apply the following procedure:

$ make bzImage
$ make modules
$ su
password:
# make modules_install
# cp /usr/src/linux-2.6.4/arch/i386/boot/bzImage /boot/linux_2.6.4-1
<update lilo.conf>
# lilo
# reboot

My friend did like this and 2.6.4 kernel runs smoothly, all packages required by 2.6.x kernel are up-to-date, but is this situation normal without changing ANY links and without copying ANY System.map?

Thanks in andvance,

Yours

rosol11
 
Old 04-19-2004, 05:41 AM   #2
urzumph
Member
 
Registered: Jan 2004
Location: Australia
Distribution: Debian
Posts: 168

Rep: Reputation: 30
It might fail. You also need the System.map file. Just copy that into /boot, check it's set right in lilo.conf, and you're good to go.
 
Old 04-19-2004, 09:33 AM   #3
denominator
Member
 
Registered: Oct 2003
Distribution: Red Hat 9
Posts: 42

Rep: Reputation: 15
What does the System.map file do? Ive never heard of it either, but im just a noob
 
Old 04-19-2004, 09:39 AM   #4
rosol11
LQ Newbie
 
Registered: Mar 2004
Location: Cracow, POLAND
Distribution: Red Hat 9.0
Posts: 13

Original Poster
Rep: Reputation: 0
Thanx for the quick reply,


The only entry in lilo.conf that refers to map files is the general option:

map=/boot/map

which is said to point to the "map" file which contains names and localizations of kernel images. How will it know that I've just copied the new System.map into /boot? And if I can rename the new System.map into e.g. System.map-2.6.4 how is the system about to know what to do? I still don't get what's the use of the link System.map that points to System.map-2.4.20-8 in my case. What will happen when I make the link point to System.map-2.6.4? Shall I do anything with these links to have several different independent fully working kernel images?


Yours

rosol11
 
  


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